Overview
A heart attack, also called a myocardial infarction (MI), occurs when the heart muscle is deprived of oxygen to the point that the heart tissue dies.
What is going on in the body?
The left and right coronary arteries are the first branches to leave the aorta, the main artery of the body. The coronary arteries supply blood and oxygen to the heart muscle. When these arteries do not deliver enough oxygen, a pain known as angina results. If the heart muscle is deprived of oxygen for a long enough period of time, the heart cells begin to die. This is called a heart attack.
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